Java.io.PrintWriter.println() 方法 Java.io.PrintWriter.printf String() 方法 Java.io.PrintWriter.println Boolean() 方法 Java.io.PrintWriter.println() 方法 package com.codingdict; import java.io.*; public class PrintWriterDemo { public static void main(String[] args) { String s = "Hello world."; // create a new writer PrintWriter pw = new PrintWriter(System.out); // print string pw.print(s); // change the line twice pw.println(); pw.println(); // print another string pw.print("Two lines skipped."); // flush the writer pw.flush(); } } Java.io.PrintWriter.printf String() 方法 Java.io.PrintWriter.println Boolean() 方法